Process of carbonizing paper



(Specimens.)

s. E. TROTT. PBOOESS OF GARBONIZING PAPER.

No. 319.353. Patented June 2, 1 885.

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PROCESS OF CARBONIZING PAPER.

SPECIFICATION forming part of Letters Patent No.'319,353, dated June 2.,1885.

Application filed February 6, 1884. (Specimens) To all whom it mayconcern:

Be it known that I, STINsoN E. Tnorr, a citizen of the United States ofAmerica, residing at Wilmington, in the county of Will and State'ofIllinois, have invented certain new and useful Improvements inOarbonized Paper and Mode of Making Same, of which the following is aspecification, reference being had therein to the accompanying drawing.

The figure is a vertical cross-sectional view.

This invention consists in a method for can, bonizing paper for buildingand other analo j gous purposes and rendering it impervious toj moistureand less destructible for wear o1 floors, 800.

In the drawing asimple device is shown and intended more to illustratethe method and means of treating the paper to produce the result than asany particular invention, except so far as to the means of heating thecarbonizing-rolls.

A A represent a pair of hollow rolls of a paper-machine, such as areheated by steam admitted through their journals in the ordi nary manner.

13 B are a pair of solid rolls, the lower one of which is intended to beheated by a flame, F, which may be of any kind or applied in any form soit will heat the roll.

0 is a sheet of straw-board paper, which, as it emerges from between therolls A A, passes down under a roller in vat D, and from thence outbetween the rolls B B. The vat D contains a compound or mixture ofrubber, asphaltum, and sulphur, the proportions of which can be variedto be the most effective for thekind and quality of paper used. As thepaper passes through this compound or mixture, it becomes thoroughlysaturated with it, and then immediately passes between the rolls B I3,the lower one of which in this case is heated to a high enoughtemperature to carbonize the saturated paper to a sufficient degree torender itvery compact, hard, and imsuch a degree as to destroy the iiberand texture of the paper.

The object of using a flame to heat the roll 13, or both of them, ifdesired, is that it is not possible to raise the temperature of a set ofrolls by steam to such a degree as to produce carbonization of the paperand the substance with which it is saturated.

The paper, when thus treated and carbonized, forms a hard densesubstance capable of a high degree of polish, well suited for use onfloors, roofs, walls, &c., almostindestructible so far as the action ofthe weather is concerned.

In the device for so treating the paper any number of rolls may be used.Both the upper as well as the lower rolls may be heated by a flame; orthe initial set may be heated by steam when less degree of temperatureis required at first after the paper leaves the bath.

The compounds named may be substituted by others that may be theirequivalent and will produce said result.

I am aware that it is not new to simply saturate paper with thematerials named, and hence I do not claim it is new simply to sosaturate the paper without carboniziug the composition, as stated.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows, to wit:

In the manufacture of incandcscents, the method described of producing acarbonized paper by passing the paper through a compound or mixture ofrubber, asphaltu m, and

sulphur, and then passing the papefso saturated between rolls heated tosuch degree as to carbonize the same, and forming the incandescenttherefrom, substantially :as and for the purpose set forth.

STIN SON E. TROTT. Witnesses:

Tnos. H. Hurcnms, JNo. S. MILLAR.

pervious to moisture, but not'carbonized to 45

